/*####COPYRIGHTBEGIN####
 ---------------------------------------------------------------
 Copyright (C) 2010 Steve Karg <skarg@users.sourceforge.net>

 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, including
 without limitation the rights to use, copy, modify, merge, publish,
 distribute, sublicense, and/or sell copies of the Software, and to
 permit persons to whom the Software is furnished to do so, subject to
 the following conditions:

 The above copyright notice and this permission notice shall be included
 in all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ---------------------------------------------------------------
####COPYRIGHTEND####*/
#ifndef BITS_H
#define BITS_H

/********************************************************************
* Bit Masks
*********************************************************************/
#define BIT0            (0x01)
#define BIT1            (0x02)
#define BIT2            (0x04)
#define BIT3            (0x08)
#define BIT4            (0x10)
#define BIT5            (0x20)
#define BIT6            (0x40)
#define BIT7            (0x80)
#define BIT8          (0x0100)
#define BIT9          (0x0200)
#define BIT10         (0x0400)
#define BIT11         (0x0800)
#define BIT12         (0x1000)
#define BIT13         (0x2000)
#define BIT14         (0x4000)
#define BIT15         (0x8000)
#define BIT16       (0x010000UL)
#define BIT17       (0x020000UL)
#define BIT18       (0x040000UL)
#define BIT19       (0x080000UL)
#define BIT20       (0x100000UL)
#define BIT21       (0x200000UL)
#define BIT22       (0x400000UL)
#define BIT23       (0x800000UL)
#define BIT24     (0x01000000UL)
#define BIT25     (0x02000000UL)
#define BIT26     (0x04000000UL)
#define BIT27     (0x08000000UL)
#define BIT28     (0x10000000UL)
#define BIT29     (0x20000000UL)
#define BIT30     (0x40000000UL)
#define BIT31     (0x80000000UL)

/* a=register, b=bit number to act upon 0-n */
#define BIT_SET(a,b) ((a) |= (1<<(b)))
#define BIT_CLEAR(a,b) ((a) &= ~(1<<(b)))
#define BIT_FLIP(a,b) ((a) ^= (1<<(b)))
#define BIT_CHECK(a,b) ((a) & (1<<(b)))

/* x=target variable, y=mask */
#define BITMASK_SET(x,y) ((x) |= (y))
#define BITMASK_CLEAR(x,y) ((x) &= (~(y)))
#define BITMASK_FLIP(x,y) ((x) ^= (y))
#define BITMASK_CHECK(x,y) ((x) & (y))

#ifndef _BV
#define _BV(x) (1<<(x))
#endif

#endif
